INTRODUCTION: Primary heart neoplasms have a prevalence of 0,02% (200 per million), 75% of them are benign, and 50% are myxomas. Symptomatology is associated with heart rhythm disorders, tumor placement, and severe hemodynamic alterations. According to the literature, 15% of patients with atrial myxoma can experience sudden death due to coronary and systemic embolisms.CLINICAL CASE: The 76-year-old female patient described orthopnea, dyspnea, and palpitations with increasing intensity during 5 years of progression. Stands out the tachypnea, jugular venous distention, grade 1 edema in inferior limbs, Duroziez rhythm, strong S1 sound and pulmonary crackles. The echocardiography showed a left sided mass which was surgically removed.DISCUSSION: Patient presents secondary symptoms due to the obstructive mass as described in the literature. The patient is outside the most common age range (30-60 years), nevertheless the patient is female in which the cases are usual. The location of the tumor in the patient is in the left atrium, which is the frequent site.